Thomas silvee



(No Model.)

T. SILVER.

MEGHANIGAL LAMP.

Patented Nov. 3, 1885.

III IIIIIII III IIIHI'IIIIIIHIII Illlllll IHII lll Minas@ ed* UNITED STATES PATENT OFFICE THOMAS SILVER, OF NEW YORK, N. Y., ASSIGNOR TO OR'VILLE D. LOVELL, OF SAME PLACE.

MECHANICAL LAMP.

SPECIFICATION forming part of Letters Patent No. 329,600, dated November 3, 1885.

Application tiled November 15, 1884. Serial No. 147.998.

T0 aZZ whom, it may concern.'

Be it known that I, THoMAs SILVER, of the city and county of New York, in the State of New York, have invented a new and useful Improvement in Mechanical Lamps, of which the following is a specification.

My invention relates to that class of lamps known as mechanical lamps, in which the flame is supplied with air from a current produced by a rotary fan driven by clock-work or equivalent mechanism Within the stand of the lamp.

The nature of the invention consists in the novel method of communicating motion to and regulating the speed of the fan. Heretofore a spur-wheel engaging aworm upon the upright fan -shaft has commonly been used p for this purpose. In my own patent, No. 287,334,dated October 23, 1883, I have employed a step form of contact or anti-friction wheels. My present invention, however, more especially consists in the combination, with the fan and the motor employed to drive it, of a plain driving friction-wheel secured upon a horizontal shaft and engaging with its periphery the face of a rotary plain friction disk upon the upright fan-shaft and transmitting motion to said disk and the shaft, the said driving friction-wheel being adjustable in a direction parallel with the axis of its shaft, and thus capable of being brought nearer to or farther from the center of the disk on the fan-shaft to provide for varying the speed of the fan, as may be required to diminish or increase the supply of air to the lamp-burner, which cannot be done with the step-formed anti-friction wheels heretofore employed to transmit motion to the fan Without changing some of the wheels of the gearing.

With a View to compensate for the unavoidable variation in the tension of the spring employed as the motor of the clock-Work or mechanism for driving the fan, and thereby to equalize or preserve uniformity of the speed of the fan, and so produce a uniform supply of air to the burner, my invention also consists in the combination, with thesaid mechanism and the said friction-wheel and friction-disk, of automatic means of moving the said friction-wheel toward or from the center of the angles to Fig. l.

(No model.)

disk as the tension of the spring is increased or diminished.

The invention further consists in certain details of construction, hereinafter described and claimed.

Figure l is a vertical sectional view of the column or pillar of a lamp, showing also, partly in section and partly in elevation, a blowing apparatus constructed according to my invention. Fig. 2 is a vertical sectional view of the same blowing apparatus, taken at right Fig. 3 is a plan view illustrating the frictiionlwheel, its shaft, and the frame that carries it.

Similar letters of reference denote corresponding parts in all the figures.

A designates the hollow column adapted to form the stand of a lamp and a casing for the fan and its driving mechanism.

As neither the reservoir nor burner forms a part of my invention, they are not here shown.

B designates the frame-work, which supports and furnishes bearings for the train of wheels D, driven by atspring, C.

G designates the fan, carried by the upright shaft H,which is journaled at hand h'. Upon this shaft is fixed the plain flat friction-disk H, and upon the horizontal shaft E, which is the last shaft of the train, is mounted the plain friction-wheel F, which, as will be presently more fully described, transmits motion from the spring and train to the fan. The fan G is arranged in a case, g, near the top of the casing or column A. The bottom of this fancase has an opening, g, in its central part, to admit air to the fan. Motion is transmitted from the shaft E to the fan-shaft H by the periphery' ofthe friction-wheel F, running in contact with the under face of the frictiondisk H. This Wheel and disk may be made of hard rubber or any other suitable material. It is Well understood that the e'ective working force of such a spring will naturally diminish as the tension produced by Winding is expended. This diminution of effective force, if it were not compensated for,would produce a constant decrease in the speed of the fan. This inequality may be obviated by causing the periphery of the friction-wheel F to engage the friction-disk H successively in parts ICO at different distances `from itsVv center during the action of'the drivingspring.A This may be accomplished automatically in various Ways. In theexample given,to enable such a compensation to be effected the shaft E is journaled in a horizontally-movable frame, I, which is provided with three gudgeons, i 'i' i2, fitted to slide in a direction parallel with the shaft E in suitable openings in the main frame B. This frame is kept pressed against a lever, C', on one side by a spring, K,attached to the main frame B on the opposite side. This lcver Cfis fulcrumed to the main frame at c", and its upper end Vis fitted with a screw, e, which bears against the frame I. The. lower end of the said lever is notched to engage a flange on a'nut, c, which is titted toa screwthread, G2, on the back end of the springwinding arbor C. A fixed pin,b, secured in the framin'gB and projecting into anotch in the nut c, prevents it from turning with the screw, but permits it to move Vlongitudinallv thereon. The screwl G2 has yits thread running in the opposite direction t'o that in which the Winding-arbor is turned to wind up the spring-thatvis to say, the arbor beA ingturned to the right, "the screw has a lefthand thread., As the spring C is woundV up, the nut c moves outward on the screw`- C, carrying With it the lower end ofthe lever G. This causes the upper end of thelever to move the frame I, and with' it the shalt E and friction-wheel F, in adirection to carry'the'periphery of the said Wheel toward the ycenter of the friction-disk H. Vh'en the spring is Wound up and its tension is greatest, thisperiphery will have arrived at its position nearest to the center of the disk, where it will en counter the greatest resistance in driving the fan, on account ofits having'onlythe minimum of leverage on the disk H. 4As the springin nnwinding turns the winding-arbor', thescrew thread C2 on the latter moves the nut c'inward toward the driving-springpand the nutA so moving carries with it the lower end of the lever C', and causes the upper end there'of to move outward. The spring K, now pressing againstthe side of the frameI which is farthest from thelever, causes the said frame to follovtr the motion of the upper end of thelever. The frame I carries with it the friction-wheel F, so that the periphery of the latter is constantly movingaway from its center. as the drivingi spring unwinds, and constantly meeting with less andless resistance in driving the fan, and thus the constant decrease of effective power in the unwinding-spring is compensated to produce a uniform speed of the fan during the action of the driving-spring.

Vhat `I claim as myinventiomand desire to secure by Letters Patent, is-

l. In a mechanical lamp, the combination, with the rotary fan and the train of mechanism for obtaining the 'power for d rivingthe same, of a friction-disk onthe shaft of the fan, and ay friction-wheelon the last shaft ofthe train, working in Contact with said disk and adjustable toward :and from? the fcenterthereof -for the purpose ofvarying' the speed o t' the fan, substantially" as; herein described."

2. Ina mechanical lamp, thecombination, with the rotary fan' and Springactuated mechanismi'or rotating it, of a friction-disk on the ian-shaft and a frictionwheel for transmitting motion from the said mechanism to said disk, and -an-automatic-device 'actuated byV said mechanism for moving the said Wheel toward and from the centerot said disk, substantially as herein described. :f g 3. The lcombination, with the rotary fanshaft Htnefriction-disk H upon said shaft, and a train of'spring-'actujated Wheels'compri's# ing a shaft, E, carrying a" friction-wheel, F, eugaging'withsaid disk, of the movable frame l carrying said shaft E, the screw C, moving with the spring-winding a'rbor,-the nut c on said screw, and the lever C between said nut and said movable frame, substantially-ias`A and fortlie plrrposeherein described.; l, Y

, Trios-SILVER.A

' NVitnesses: j

' HENRYT. BROWN,

Fannie HAYNES. 

